Mesorhaga baadsvicki, Bickel, Daniel J., 2007

Bickel, Daniel J., 2007, The Mesoamerican Mesorhaga (Diptera: Dolichopodidae), with a taxonomic conspectus of the New World fauna, Zootaxa 1411, pp. 47-67 : 60-62

Mesorhaga baadsvicki n. sp. ( Fig. 3 e)

Type material. Holotype ɗ, paratype ɗ, Costa Rica: PUNTARENAS: Est. Quebrada, Bonita son R.B. Carara, 50 m, v.1990, R. Zuniga (Holotype, INBio 194500-469850).

Description. Male: body length: 3.6 mm; wing 3.3 x 1.1 mm.

Head: 4 strong postvertical setae present, in line with the postoculars; weak proclinate vertical present on lateral frons; vertex, frons, face, and clypeus metallic green with bronze reflections; face/ clypeus with some silvery pruinosity; palp dark, metallic green, with pale hairs and black apical seta; proboscis brown; antenna black; pedicel with long dorsal and ventral setae; 1st flagellomere elongate, subtriangular; arista dorsal; ventral postcranium with white setae.

Thorax: metallic green with bronze reflections; pleura with some grey pruinosity; 2 pairs ac near anterior part of thorax; lateral scutellar setae about half length of medians.

Legs: all coxae, trochanters, FI and FII almost to apices, and all leg III dark brown; femoral apices, tibiae and basitarsi I and II yellowish; distal tarsomeres I and II dark brown; CI and CII with pale anterior hairs and black anterolateral setae; CIII with black lateral seta and some shorter whitish setae; all femora with av and pv rows of white setae at least to 3/4; I: 3.7; 4.2; 2.0/ 0.7/ 0.5/ 0.4/ 0.5; It5 with 2 long, strong claws, longer than on other legs (MSSC). II: 4.5; 5.2; 3.0/ 1.2/ 1.0/ 0.4/ 0.4; TII with dorsals at 1/3 and 2/3, ventrals at 2/5, 4/5, and with strong apical ad, av, and pv setae. III: 5.7; 6.4; 2.0/ 2.0/ 0.8/ 0.7/ 0.4; TIII with some slightly stronger dorsal setae, and strong apical ventral seta.

Wing: with faint brown wash over wing anteriad of vein R4+5; vein M with right-angle curve at 1/3 between dm-cu crossvein and wing apex; CuAx ratio: 0.6; lower calypter yellow, with black rim and fan of black setae; halter with brownish stalk and yellow club.

Abdomen: terga 1–5 metallic green with bronze reflections, covered with short dark setae dorsally; tergum 1 with posterolateral black setae; terga 7–8 black with bronze reflections; hypopygium ( Fig. 3 e) dark brown; phallus and hypandrium elongate and narrow; epandrial lobe subrectangular, with 2 setae on distal surface and strong seta near base; surstylus with setae as figured; cercus curved and distally clavate, with short, thorn-like setae and long, subapical setae as figured.

Female: unknown.

Remarks. Mesorhaga baadsviki is known only from a lowland locality in Puntarenas, Costa Rica. Males have both claws on leg I greatly enlarged.

The species is named in honor of Dr. Karl Baadsvik, for his outstanding scientific and administrative work as Director of the Norwegian Institute of Nature, his concern for biodiversity conservation, and his support in the consolidation of INBio.

Figures

FIGURE 3. Mesorhaga isthmia n. sp. a hypopygium, left lateral. b. male postabdomen with phallus extended, left lateral; c. male tarsus I, posterior view. d. male wing, dorsal. M. baadsvicki n. sp.: e. hypopygium, left lateral. M. mexicana n. sp.: f. hypopygium, left lateral.